Disappearing tooth bars for concaves



Dec. 28, 1948. MQLL 2,457,259

' DISAPPEARING TOOTH BARS FOR CONCAVES Filed Nov. 13, 1944 Y 4 Sheets-Sheet 1 M 5 INVENTOR I FRED MATHIAS MOLL BY r ATTORNEYS Dec. 28, 1948.

F. M. MOLL 2,457,259

v DISAPPEARING TOOTH BARS FORCONCAVES Filed Nov. 13, 1944 4 Sheets-Sheet2 INVENTOR FRED MATHIAS MOLL ATTORNEYS Dec. 28, 1948, F. M. MOLL2,457,259

' DISAPPEARING TOOTH BARS FOR. CONCAVES Filed Nov. 13, 1944 4Sheets-Sheet 3 @mmmfiw m w mm @m mmwwm w @m @mm m INV'ENTCR FREDMATHIAS. MOLL ATTORNEYS Dec. 28, 1948. F. M. MOLL' 2,457,259

, DISAPPEARING TQOTH BARS FOR CONCAVES Filed Nov. 13, 1944 4 Sheets-Shea4 INVENTOR FRED MATHIAS MOLL ATTORNEYS Patented Dec. 28 1948"DISAPPEKRTNG TOOTH BARS FOR -'00NCAVES Fred Moll, West. Bend, Wis.

"Application November 13, 1944,"Serial No. 563,279

' -.%3'Glaims. 1

This invention appertains to threshing ma- '-iili-ines and moreparticularly to a "novel concave "therefore.

In threshing different kinds of grain, it-is-high- "ly' desirahie, in"order "to obtain best results, to

change'the' concave bars and teeth 'accordirrgto the character and typeof the -'-grain "being 'threshed. With "the modern threshing machine,the-changing of the concave bars and -teeth is a difii'ctilt, tediousand time-con'suming job.

"-Itis, therefore, one or the primary objects of my invention to eroviderockaihle toothed bars ior the concave with means for rocking the *barsfrom *t-he exterior of the threshing machine,

whereby the desired number of toothed bars can be "conveniently andexpeditiously operated to brhrg-the teeth into andout df play. 7

fhnolth'er salient nbject of my invention is to provide novel 'rn'ean'sfor forming the rocking tooth hars'of -a--'concave,:?so-tha-t when thebars are rocked to "move the teeth to an inoperative position, the teethof one loar will be received in grooves or "notches-of the adjacent bar,whereby not only 'will said teethhe protected, but whereby theiteeth canhe'movedto an extreme lowered desired position to form. an 'e'fiectivegrate. A iurtherimportant object of'myinvention is to provide novelmeans for supporting the rock able bars, whereby said bar-scan beconveniently :removed when necessary or desirable Without dismant'iingthe cylinder and concave.

.A .still tur'ther important. object of my inventionis the provision ofnovel plates formed on or carried Joy the bars adapted to be broughtinto ran operative position toward the .arcuatei ace of :a concave, whenthe teeth are in their lowered position, whereby to increase the-efficiency of .said loars as-a-grate.

I these and other voba'ects in view the invention consists in the novelconstruction, arrangement and formation :of parts, as "Win hehereinafter more specifically described, claimed and illustrated in theaccompanying drawings, :in which drawings:

Figure l is a fragmentary vertical longitudinal sectional view throughathreshing machine showing the cylinder andlconcave portion, the

view being taken substantially vonthe line .-ll of Figure 5 looking inthe direction of the arrows. 7

Figure 2 is a view similar to Figure l'with the cylinder removed and allof the rockable sgrate ihazrs moved-to their lowered position.

Figure 3 is a ..fragmentary side elevation-all view of a "threshingmachine showing the :finean-s ifor rocking thegrate bars.

Figure 4 is an enlarged fragmentary detail sectional View taken on theline 4-4 of Figure 1, looking in the direction of the arrowsillustrataway xafrom the cylinder :cam :22 extends heyond one outer side:face

ing my novel rmounting for the rockable grate bars and bhe grate plates"carried thereby.

F-igure 151.1 .a horizontal section takensubstantially on 'tlrefline':5-15=.of Figure 1, looking :in the direction ofit'he arrows, showingmy novel {grate bars and the operating "means therefore.

jiFi'gure "6 "is :an enlarged fragmentary :detail sectional viewillustrating a modified form of any invention showing Ea rsmgle mea'ns.for simultaneously racking :a :pair or toothed .ba-rs.

:F'igure '7 iis a view similar to Figure 6, hutnshowin'g the grate barsactuated'ito move the teeth to a loweredfinoperatiweposition.

nheteriiing to the 'cdrawings in :detail, wherein similar referencecharacters designate correspending partstthtou-ghout the several views,the deoter C generally indicates my improved conoiaizei or a threshingmachine T.

@IIfly a nsnfii'cient portion of the threshing ma- !I hasiheen :shown to"iilustratethe novel te'atuives of :my concave, "and as i-iilustrated,the threshingzmachirre includes the usual side :irame plates 1'0 and itwhich support the cylinder 12 are rocleahly supported at one end "on across bar 26 carried by .a'the frame of the threshing machine and theopposite ends of the castings are supported :by 2!. These cams are keyed:or lothrerwise secured to a transversely extendling cam shaft =22rotatable mounted on the frame tot thethreshing machine. -By turningtheshait, the entire concave can be adjusted toward and "One end of theof the "threshing machine and is provided with .am npenat'ingirandlev-oracrank 23. Arratchet wheel 2:24 dog 25 :can be provided forholding the cam shaft-in :-a preferred adjusted position.

brought out :in the objects of the specifiicait'i'on 'the roclzablegratevbars d8 formthezsa-lient "teatime of invention and :as illustratedthese received in bearing sleeves 28 which are threaded in the sideconcave casting plates I-6. By this ar.

rangement the bearings can be threaded outwardly to move the same awayfrom the bearing pintles, so that the bars can be dropped. To facilitatethe movement of the grate bars out-of the side casting plates I6 saidcasting plates can be grooved or slotted as at 29 below the bearingsleeves.

In view of the fact that the toothed bars I 8 are rocked from theexterior of the threshing machine; it is necessary to have the bearingpintles 27 on one side relatively longer than the bearing pintles on theother side and the longer bearing pintles extend slightlybeyond one sideface of the threshing machine and have removably keyed thereto operatingcranks 30.

In removing the rockable grate bars, the cranks 30 are first taken offof the pintles and bearing sleeves are threaded outwardly on bothsides'until the shorter bearing pintles can be slid downwardly and outof the bearingsleeves after which the longer pintles are slid from outof their bearing sleeves.

Any preferred means can be provided for operating the rock bars, but asshown in the drawings, I provide operating levers 3|.for the cranks 30.Each of the levers can terminate in an operating handle 32 and obviouslyby pulling the levers back and forth the bars can be rocked. In order tohold the levers in an adjusted position with the rock bars either intheir operative or inoperative position the lower edges of the levers 3|are provided with notches 33, and these notches can be moved intoengagement with a lock angle bar 33 carried by the frame of the machine.A slotted guide bar 34 can also be provided for facilitating the correctmovement of the levers.

When the levers 3| are pulled forwardly with the cranks in their dottedline position shown in Figure 3, the rock bars I8 will be so positionedthat the teeth 26 will be in a raised operative position. Hence, theteeth will project toward the cylinder I2. When the levers arepositioned rearwardly, the cranks 30 will be moved to the full lineposition shown in Figure 3 and the bars clearly shown in Figure 2.Hence, the bars I8 can be of theusualwidth and still permit theeffective lowering of the teeth. The grooves 35 also form 36 will beraised to an operative position.

In some instances it may be advisable to operate pairs of the bars I8 inunison and to only provide one operating lever for two bars. In Figures6 and 7 I haveshown-suchan arrangement. As illustrated, adjacent barscan have secured to their bearing pintles sector gears 31. These gearsintermesh so that movement of one bar will be transmitted to an adjacentbar. In this arrangement the rock bars move toward and away from oneanother and one of the rock bars of a pair of rock bars can be providedwith an .operating crank 38 and this crank has pivotally connectedthereto the operating lever 39.

l Fromthe foregoing description, it can be seen that I have provided anexceptionally simple and durable concave for threshing machines in whichthe toothed bars thereof can be quickly and easily adjusted to bring theteeth thereof into and out of play. I

Changes in details may be made without departing from the spirit or thescope of my invention, but what I claim as new is:

1; In a threshing machine, a concave including a plurality of pivotallysupported toothed bars, the teeth of said bars being of a greater lengththan the distance between the bars, means for rocking said bars, andsaid bars having grooves for receiving teeth of adjacent bars when thebars are rocked to move the teeth to a lowered position to form asupport and stop for said teeth.

2. In a threshing machine, a concave including a plurality of pivotallysupported bars, teeth projecting outwardly from said bars, the teethbeing of a greater length than the distance betweenthe bars, means forrocking said bars to move the teeth thereof to a raised operativeposition and to a lowered inoperative position, one edge of the barsbeing provided with groovesfor receiving the leading edges of the teethwhen the bars are rocked and the teeth are in their lowered position toform a support and stop for said teeth.

3. In a threshing machine, a concave including a plurality of pivotallysupported rock bars arranged in relatively close proximity to oneanother, teeth carried by and projecting outwardly from the upper facesof the rock bars, said teeth being of a greater length than the distancebetween the bars, means for rocking said bars for moving the teetheither to a raised operative position or to a lowered inoperativeposition, one edge of either of said bars being provided with groovesfor receiving the leading edges of teeth of adjacent bars, when the barsare rocked to move the teeth to a lowered position to form a support andstop for said teeth, and grate fingers carried by the mentioned edges ofthe bars and extending in an opposite direction to the teeth movable toa raised position when the teeth are in their lowered position.

FRED M. MOLL.

REFERENCES CITED The following references are of record in the I file ofthis patent: 1

UNITED STATES PATENTS Number Name Date 768,200 Speirs et al. 'Aug. 23,1904 896,097 Flynn Aug. 18, 1908 1,162,548 Barhorst Nov. 30, 19151,191,853 Thompson July 18, 1916 1,269,109

Noack June '1 1, 1918

